Not sure if this has been posted before,
but you can make really decent gold if you're exalted with the Sha'tari Skyguard on any character.
Note: Requires about 200-300 gold investment.
Simply park your character who's exalted with them at the vendor and buy the Nether Ray Fry pet. Nether Ray Fry - WoWWiki - Your guide to the World of Warcraft
and you can buy three and learn them so that they're in your pet journal, and then log off, go on another character put them in a cage and sell them for decent money. On my server, they're going for 400-500g and I've sold about 5 or 6 of them so far. Even if they only sell for 200g a piece, that's still a net profit of over 300g (assuming you bought three of them)
This works for any reputation based pet.
I hope I contributed well!
=)